Lock-nut.



M. sHEHn/mm.4

LOCK NUT.

APPLICAHON FILED AUG.22, |913.

LWKQ, Patented @on 19, 1915.

2 SHEETS-SHEET 2.

MOSES SHERMAN, 0F NEW YORK, N. Y., ASSIGNOR OF ONE-THIRD TO SELMAN LISS .AND ONE-THIRD TO BERT RIVKIN, BOTH 0F NEW YORK, N. Y.

LOCK-NUT.

Specification of Letters Patent.

Patented Oct. 19, 1915.

Application filed August 22, 1913.' Serial No. 786,128.

T 0 all whom it may concern.'

Be it known that I, MOSES SHERMAN, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Lock- Nuts, of which the following is a specification.

This invention relates to improvements i'n-lock nuts, and the objects are to provide a device of this character to be used on bolts, studs, axles of vehicles, pitmen, stay rods, etc., and to provide a device in the shape of a nut which can be adjusted independently of its locking member to any pointupon vthe screw thread of the stud and then have the locking member placed in the proper position for securing the nut where it has been located without disturbing thev position of the same.

rIhe further objects are to provide a locking device of this character which has a greater friction surface for the binding or locking of the thread of the nut and stud than has heretofore been attained Without materially increasing the proportion 'of the device, and to make a device which is simple and cheap of manufacture and easy to assemble and operate.

The still further object is to provide a nut with a locking member which when operated will have a cam action to increase the strain on the thread of the nut and stud and hold the same more securely than has been heretofore accomplished, without increasing the operating power of assembling.

With these and other objects in view, it will be seen by referring to the accompanying drawings forming a part of this specification, and which in a general way illustrate the principle and spirit of my invention that I have accomplished the foregoing, and it will be understood that these drawings do not show all of the modications of various parts which may be changed without departing from the scope of the invention` as defined by the appended claims.

Figure 1 is a longitudinal section taken through the center of the device, showing r, the lnut and locking device assembled upon a stud; Figs. 2 to 6 are diagrammatic views showing a part of the stud nut and locking member and illustrating the mode of assembling, and showingthe locking member in its various stages from the starting to 9 is a similar view to Fig. 8, but showing the thread of the small end of the tapered end of the nut.

It will be seen in Fig. 1, for the sake of illustration I provide a nut 1 with a straight internal thread 2 of a standard pitch to fit the thread 3 of the stud or bolt 4. 'Ihe nut l is further provided with a portion 5, which may be of hexagonal shape, or of any other desired formation, or cylindrical and have holes for a Spanner wrench, the exact contour of this part being unimportant.

The main portion 6 of the nut 1 is provided with a predetermined taper 9, which in turn is provided with a thread 7 of the same pitch as the internal thread 2; that isY to say, the threads are the same in number to the inch in both cases, and by a certain process, which will be made the subjectmatter of another application, the threads are so cut that the threads 2 and 7 are made yto register with each other on the whole thread or the half thread as desired. For illustration, I have shown the threads registering on the half threads, or in other words, the thread 2 commences exactly 180 degrees from where the thread 7 commences on the nut l, and the thread 11 commences exactly 180 degrees from where the thread 13 commences on the locking member and this causes the commencement of the thread 13 and the thread 7 to be at the same point whenthe nut and locking member are on the stud 4, and the object of this will be described later on, but it has been found that with the threads registering either on the half or whole thread they work equally well and accomplish the results, which cannot be attained by devices which have threads of different pitches.

The locking member 10 has a portion 41 of the same contour as the part 5 of the nut 1. This locking member 10 is provided with a straight internal thread 11, which is of the will be in accord with any pitch of thread which is selected. For instance, if a pitch of four threads to the inch is selected, then the dimensions 14, 15, 16 and 17 will each be a quarter of an inch. It will be understood that whatever the pitch of the thread is each of the dimensions 14, 15, 16 and 17 will be zthe same in length, but the dimension 18 will be a small fraction less length than that of the others, and this is what causes the locking of the/device and the peculiar cam action of the threads 7 and 13 on the last part of 'the movement of the locking member.

By referring to Figs. 2 to 6, which show the nut 1 adjusted upon the stud fand the locking member 10 in its various stages, and clearly showing how the locking member is screwed into posit-ion without the threads 7 and 13 interfering or coming into contact with each other until the nal turn ormove.-

vment of the locking member 10 is made, it

will be noted how the spaces 19 formed between the faces 2O f the thread 13 and the faces 21 of the thread 7 close more rapidly than the spaces 22 formed between the faces 23 of the thread 13 and the faces 241` of the thread 7, and upon the final action the spaces 22 are not completely closed, but the spaces 19 are all completely closed and the angular faces 20 being vforced down on the angular faces 21 forming a sliding cam surface which is gradually changing its angular inclination with the axis of the nut and stud, and also the thread 3 of the stud, as clearly shown in Figs. 7, 8 and 9. This construction causes the locking member to gradually increase its speed of travel in the direction of the arrow 25, Vand this increased speed of the 'locking member 10 causes a locking strain or tension to be exerted in opposite directions and parallel with the axis of the stud 21 between the faces 20 and 21 ofy the threads 7 and 13 and the faces 26 and 27 of the threads 2 and 3, and the faces 28 and 29 of the threads 2 and 11. Itwill be seen from the foregoing that the long continuous spiral made by the face 21 of thread 7 Working in conjunction with the face 20 of the thread 13, which has exactly the same angular inclination to the axis of the stud 4; as the face 21 has to the stud and thus forms a pair of opposite direction upon the faces of the u .4

threads of the stud and the threads 11 of the locking member.

While I have shown in Figs. 2 to 6 the space 22 slightly exaggerated, it will be understood that the width of this space 22 can be varied to suit any case, by simply changing the length of the dimension 18 which regulates it.

It will be understood that while I have described and illustrated in the drawing the dimensions 14 to 17 as being the same and the dimension 18 as smaller, I do not Wish to confine myself to this, since by making the dimensions 14 and 17 the same and the dimension 18 of a greater width than the dimensions 14, 15, 16 and 17 the results will be the same as already described, except that instead of thev nut and locking member being drawn close together by the increased speed of the locking member the action is reversed and the speed of the locking member will be retarded and .the locking member forced backward and the nut forward, thus causing the strain or tension on the threads of the stud as already des-a1: ineflI but in each case in the exactly opposite direction, but there will be exactly the same number f strains in each direction and exactly alike.

The operation of this device is very simple. The nut 1 is screwed up to the desired `position' on the stud or bolt and then the locking device is screwed up on the stud until the cam thread 7 has drawn it so tight upon the threads of the stud that it cannot be turned any farther, and then all parts are locked in position by the strains.

It will be seen by the foregoing that I have invented a simple and inexpensive locking device which is easily operated.

IVe claim as our invention:

1. In combination, a threaded stem, a nut having a tapered threaded portion, the thread of the stem and the threaded tapered portion of the nut being in register with each other, and a locking member having a tapered recess provided with a thread in register with the tapered thread of the nut and slightly out of register with the thread of the stem, for the purposes described.

2. In combination, a threaded stem, a nut having a tapered threaded periphery and having its bore threaded straight or regular and of the same pitch, the two threads being in register with each other, and a locking member having a tapered threaded recess of the same taper as the nut and the bore thereof having a straight or regular thread of the same pitch as the stem, but so arranged that the space between the ending of the straight thread on the sleeve and the commencing of its tapered thread is different from the dimension of the pitch of the threads.

3. In combination, a threaded' stem, a nut having a tapered threaded. periphery and having its bore threaded straight or regular and of the same pitch, the two threads being in register with each other, and a locking member having a tapered threaded recess of the same taper as the nut and the bore thereof having a straight or regular thread of the same pitch as the stem, but so arranged that the space between the ending of the straight thread on the sleeve and the commencing of its tapered thread is less than the dimension of the pitch of the threads.

4;. In combination, a threaded stem, a nut having a tapered `threaded .periphery and having its bore threaded straight or regular and of the same pitchthe two threads being in register with each other on the half thread, and a locking member having a tapered threaded recess of the same taper as the nut and the bore thereof having a straight or regular thread of the same pitch as the stem, but so arrangedthat the space between the ending of the straight thread on the sleeve and the commencing of its tapered thread is diderent from the dimension of the pitch of the threads.

5. In combination, a threaded stem, a nut having a tapered threaded periphery and having its bore threaded straight or regular and of the same pitch, the two threads being in register with each other on the half thread, and a locking member having a tapered threaded recess of the same taper as the nut and the bore thereof having a straight or regular thread of the same pitch as the stem, but so arranged that the space between the ending of theA straight thread on the sleeve and the commencing of its tapered thread is less than the dimension of the pitch of the threads.

6. In .a nut lock, a threaded stem, a nut threaded to engage the stem and having a tapered periphery, and a locking sleeve/having one portion of its bore threaded to engage the stem, and having another portion of its bore tapered similar to the said tapered nut portion, said tapered portions of the sleeve and of the nut being'arranged whereby upon the sleeve being screwed on the stem to engage the rtapered threaded nut portion the rear faces of the tapered threads of one member willV engage the relatively opposed or forward faces of the other said tapered threaded part, while the adjacent or relatively opposed threaded faces of both the members will be free from engagement, and said engaging tapered thread faces will bind to lock the nut on the stem.

7. In a nut lock, a threaded stem, a nut [threaded to engage, the stem and having a tapered periphery, and a locking sleeve having one portion of its bore threaded to,

engage the stem, and having another portion of its bore tapered similar to the said tapered nut portion, said tapered portions of the sleeve and of the nut being arranged whereby upon the sleeve being screwed on the stem to engagethe tapered threaded nut portion the rear faces of the tapered threads of the vsleeve will engage the relatively opposed or forward faces of the other said tapered nut, while the adjacent or relatively opposed threaded faces of both the members will be free from engagement, and said engaging tapered thread faces will bind to lock the nut on the stem.

l 8. In a nut lock, a threaded stem, a nut threaded to engage the stem and having a tapered periphery, and a locking sleeve having one portion of its bore threaded to engage the stem, and having another portion of itsbore tapered similar to the said tapered nut portion, said tapered portions of the sleeve and ofthe nut being threaded similar to said threaded parts, but arranged whereby upon the sleeve being screwed on the stem to engage the tapered threaded nut portion the rear faces of the tapered threads of one member. will engage the relatively opposed or forward faces of the other said tapered threaded part, while t-he adjacent or relatively opposedthreaded faces of both the members will be free from engagement, and said engaging tapered thread faces will bind to lock the nut on the stem.

9. In a nut lock, a threaded stem, a nut threaded to engage the stem and having a tapered periphery, and a locking sleeve having one portion of its bore threaded to engage the stem, and having another portion of its bore tapered'similar to the said tapered nut portion, said tapered portions of the sleeve and of the nut being threaded similar to said threaded parts, but arranged Whereby upon the sleeve being screwed on the stem to engage the tapered threaded nut portion the rear faces of the tapered threads of the sleeve will engage the relatively opposed or forward faces of the other said nut, while the adjacent or relatively opposed threaded faces of both the members will be free from engagement, and said engaging tapered tiread faces will bind to lock the nut on the s em.

Signed at New York in the county of New York and State of New York, this 12 day of August, A. D. 1913.

MOSES SHERMAN.

Witnesses:

JACOB LAGHoWsKI, LOUIS LEVINE. 

